Splitting of the second heart sound in different age groups of normal children.
D002648:Child; D002675:Child, Preschool; D005260:Female; D006326:Heart Auscultation; D006339:Heart Rate; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D010701:Phonocardiography; D012119:Respiration